CITIZEN NJ0210-56M MECHANICAL MEN WATCH
NJ0210-56M
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- Backordered, shipping soon
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- 3 Years Warranty
The Citizen NJ0210-56M is built around a green dial with serif Arabic numerals and an outer minute track — a slightly vintage, field-watch-adjacent look that gives it real character against the usual black or white options. A date window sits neatly at 3 o'clock.
Inside is Citizen's Calibre 8210 automatic movement — 21 jewels, 21,600 vibrations per hour, roughly 40 hours of power reserve. An exhibition caseback shows the movement in motion, a detail more often found on watches well above this price. The 40mm stainless steel case pairs with a matching stainless steel bracelet on a fixed bezel.
Mineral glass protects the dial front and back, and the case is water resistant to 50 metres.
At a Glance
- BrandCitizen
- CollectionMechanical
- MovementCalibre 8210 Automatic
- Case Size40mm
- Thickness13mm
- DialGreen
- MarkersSerif Arabic Numerals
- DisplayDate (3 O'Clock)
- Case & BraceletStainless Steel
- BezelFixed
- CasebackExhibition
- Power ReserveApprox. 40 Hours
Why You'll Love It
- The green dial is a genuine point of difference — most automatics at this price default to black, white or blue, and green gives this a distinctive, slightly outdoors-inspired character.
- Serif Arabic numerals and an outer minute track give the dial a slightly vintage, field-watch-adjacent look, distinct from a plain modern dress dial.
- An exhibition caseback lets you watch the automatic movement in action — a feature usually reserved for watches well above this price point.
- Calibre 8210 is a genuine automatic movement: no battery, wound by the motion of your wrist, with the mechanical character that appeals to enthusiasts moving up from quartz.
- A date window at 3 o'clock keeps it functional for daily use — you don't have to choose between mechanical character and everyday practicality.
- The matching stainless steel bracelet gives this genuine everyday durability and a clean, cohesive look that a leather strap can't match.
- At 40mm, it sits comfortably under a cuff without reading as oversized.
- No battery, ever. The movement runs on the motion of daily wear, so there's nothing to replace.
Perfect For
- Mechanical Watch Enthusiasts
- Green Dial Collectors
- Steel Bracelet Fans
- Office & Smart-Casual
- First Automatic Watch
- Everyday Wear
- Gift for Him
Key Features
- Green dial — a distinctive colour choice, giving the watch a slightly vintage, field-watch-adjacent character.
- Serif Arabic numerals — with an outer minute track for clean legibility.
- Citizen Calibre 8210 automatic movement — 21-jewel self-winding mechanical movement running at 21,600 vibrations per hour with approximately 40 hours of power reserve. No battery required.
- Date display — positioned at 3 o'clock.
- Exhibition caseback — mineral crystal front and back, showing the movement in motion.
- 40mm stainless steel case — round profile, fixed bezel.
- Matching stainless steel bracelet — for a secure, comfortable fit.
- 50-metre water resistance (5 BAR) — rated for handwashing, rain and brief splashes. Not intended for swimming or diving.
Technical Specifications
The Citizen NJ0210-56M is a 40mm men's automatic watch powered by Calibre 8210, a 21-jewel movement running at 21,600 vph with approximately 40 hours of power reserve. The stainless steel case measures 13mm thick with mineral crystal front and back via an exhibition caseback, a fixed bezel, and is water resistant to 50 metres. The green dial carries serif Arabic numerals and a date display at 3 o'clock, finished on a matching stainless steel bracelet.
| Model Number | NJ0210-56M |
| Case Material | Stainless Steel |
| Case Shape | Round |
| Case Diameter | 40mm |
| Case Thickness | 13mm |
| Bezel | Fixed |
| Glass | Mineral Glass, Front & Back |
| Caseback | Exhibition, See-Through |
| Water Resistance | 50 Metres (5 BAR) |
| Colour | Green |
| Markers | Serif Arabic Numerals |
| Display | Hours, Minutes, Seconds, Date (3 O'Clock) |
| Material | Stainless Steel, Matching Case |
| Calibre | Citizen 8210 |
| Type | Automatic (Self-Winding) |
| Jewels | 21 |
| Frequency | 21,600 vph (6 beats/sec) |
| Power Reserve | Approx. 40 Hours |
Best Matched With
- Olive Field Jacket
- Khaki Chinos
- Brown Leather Belt
- Cream Oxford Shirt
- Smart-Casual Loafers
- Camel Overcoat
Frequently Asked Questions
Can I see the movement?
Yes. The caseback is a see-through exhibition window, so the automatic movement is visible from the back of the watch while it's running.
What does "automatic" mean?
An automatic watch is powered by the natural movement of your wrist. A rotor inside the case winds the mainspring as you wear it, so no battery is needed. If left unworn for about two days it will stop and need resetting — simply wear it again to restart it.
How long does the power reserve last?
Approximately 40 hours when fully wound, so the watch keeps running for close to two days after you take it off. Regular daily wear keeps it continuously wound.
How accurate is a mechanical watch?
Mechanical movements are not as precise as quartz by design — expect to reset the time every week or two. The appeal is the engineering and the absence of a battery rather than chronometer-level accuracy.
Does a mechanical watch need servicing?
Yes. Unlike a quartz watch, an automatic has moving parts and lubricants that wear over time. Citizen recommends periodic servicing to keep timekeeping and water resistance within spec. Any City Chain outlet can arrange this — bring your warranty card.
Can I swim with this watch?
No. With 50-metre (5 BAR) water resistance it's rated for handwashing, rain and brief accidental splashes, but it isn't intended for swimming, showering or diving.
Will 40mm fit my wrist?
40mm sits in the middle of the modern men's range and suits most wrist sizes from roughly 15cm to 19cm.
Is the bracelet adjustable?
Yes. The bracelet can be resized by adding or removing links. City Chain offers complimentary bracelet sizing at any outlet — bring your warranty book along for the service.
What warranty does this watch come with?
The NJ0210-56M comes with a 3-year warranty when purchased from City Chain Singapore, an authorised Citizen retailer. Keep your warranty card and proof of purchase — both are required when submitting the watch for service at any City Chain outlet.
Why Buy from City Chain Singapore
- Authorised Retailer 100% genuine Citizen product
- 3-Year Warranty Covered on every purchase
- Free Shipping All orders within Singapore
- Bracelet Adjustment Size it in-store
Extra $15 OFF with min. $200 spend
Use Code: FORYOU15
Extra $30 OFF with min. $400 spend
Use Code: FORYOU30
Caliber No.: 8210
Movement: Mechanical (Automatic)
Jewels: 21 Jewels
Frequency: 21,600 vph
Power Reserve: Approx. 40 hours (fully wound)
Functions: Date Display
Case & Build:
Case Size: 40mm
Case Thickness: 13mm
Case Material: Stainless Steel
Glass: Mineral Glass
Strap: Stainless Steel Bracelet
Water Resistance: 50 metres
Delivery within Singapore
Order by 11AM
(Mon - Fri for faster processing)
Checkout options may vary depending on order value and eligibility.
• Free Speedpost Domestic Delivery — 1–2 business days
• Free DHL Domestic Delivery — next business day
• Express Delivery — S$30, order by 2PM
• Click & Collect — ready in 2–3 business days. Please wait for the collection confirmation email before visiting the store.
Weekend & Public Holiday Orders
Orders placed after the applicable cut-off time, on weekends, or on public holidays will be processed on the next business day. Delivery will take place on the next available business day based on the selected delivery service.
During peak periods, festive seasons, major launches or sale events, additional processing and delivery time may be required.
For online purchase, you can have bracelet or leather strap adjustments done at any City Chain store. Please bring along your warranty book for the service.
